Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed438ccc12e1f858…

MALICIOUS

PDF

99.2 KB Created: 2021-06-29 14:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bac849861437d4ef0c5d474f9024d3e SHA-1: 431be6878aa6c7de9f668ebed2e03bb177edbdda SHA-256: ed438ccc12e1f858e4a064cdd533acbe6c6de508c5ab3aec373cc15073f3a933
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'coin master hack for ios' URL indicates a potential lure for users seeking cheats or exploits. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=coin+master+hack+for+ios
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f398b7340665a3e31093a419a7d3e7bf/wupazadunifebewowet.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fadd900d4b---5299538818.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ecbfd5e8f---27560096284.pdf
    • http://abwplazaview.com/uploads/files/70392962165.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f7e320f8ef842a1e65db07863174e16f/momirolesejuvunutetubu.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965821b4d83---60993476066.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160891ba8a0f4a---72723703288.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/7n648l1iovme566ano2i3474b4/18383812874.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-6-13/20210613151607706953.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ee1d1c58bbbff038a01c514357589f90/49408203898.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac48b51fd2---mojapezelubifon.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/59n6rir3jdi0o54k1n159tssp9/gaxosagowelibuwepirajake.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/resari.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160822f1800330---1295500441.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/v0in9o0i9honhqee0l4gl0ung6/vapenaruf.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/cg7jp1d2k1lqo63e1jv19uka7b/61577850195.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/385faeca58b4ac93d1c771a244b7b544/40449176805.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607119c7b0255---87095415295.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de19363b1c---23545040438.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb36c4fcc9---nulenomabalejises.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/0c6abed186cbafb35f4472e06c019842/tojaledironaru.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/selidita.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3607ca51d0---65319782721.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a517de14c---tigerojonanopixumaki.pdf
    • http://sns.hu/_user/file/lobebimixajuzagura.pdf
    • http://eraucheta.ru/uploads/file/gojova.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/tup40lcumi4e0mufkrlttdmuj5/28444633209.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108c8.bin
ce17dd50134b01bdc164e9b9ca1f886460c3f13020e70a34dfefafba246d356a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 18656 bytes
font_01_sfnt_off0001385c.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1385C 16344 bytes
font_02_sfnt_off00014e56.bin
38df4666219ccaf69f27421fe3c9187259605742571c511ef227d2eea3f7b4b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E56 10680 bytes
font_03_sfnt_off000166ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166AE 16792 bytes

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